Notes in Making API 5L Seamless Steel Tube Equipment

Notes in making API 5L seamless steel tube equipment
A. Oil Marking: Water pressure testing machine after passing the steel pipe to prevent oil corrosion, and marking in accordance with user requirements.
B. Leveling Milling: The original steel plate is flattened by an anvil press, and then the two edges of the steel plate are milled by the edge milling machine to achieve the required plate width, parallelism and groove shape.
C. Shear forming: the steel plate in the production line spiral along the outer curl into a tube.
D. Butt welding: Seamless steel pipe equipment market uses advanced double-sided submerged arc welding technology for pre-welding, welding, external welding. The welded steel pipe is cut to a gauge length using a plasma bar.
E. Visual inspection: Some basic parameters are checked by professional technicians.
F. Ultrasonic flaw detection: the development of scrap steel on both sides of the internal and external welds and base metal 100% inspection.
G. X-ray inspection: 100% of the internal and external weld X-ray industrial television inspection, the use of image processing systems to ensure the detection sensitivity.
H. Pressure test: in the hydraulic pressure testing machine on the steel pipe to the root-by-root test to ensure that the steel pipe to achieve the required standard test pressure.
I. Chamfer flat head: seamless steel pipe equipment will be tested after the pipe end pipe processing, to achieve the required pipe end (spiral welded pipe unit) groove size.
J. Final inspection: the straightening machine again ultrasonic and X-ray inspection and the end of the magnetic powder test to check the existence of welding problems and pipe-end defects.
K. Uncoiler plate exploration: After the steel plate is opened into the production line, the first full-plate ultrasonic inspection.